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+/* Argp example #2 -- a pretty minimal program using argp */
+
+/* This program doesn't use any options or arguments, but uses
+ argp to be compliant with the GNU standard command line
+ format.
+
+ In addition to making sure no arguments are given, and
+ implementing a --help option, this example will have a
+ --version option, and will put the given documentation string
+ and bug address in the --help output, as per GNU standards.
+
+ The variable ARGP contains the argument parser specification;
+ adding fields to this structure is the way most parameters are
+ passed to argp_parse (the first three fields are usually used,
+ but not in this small program). There are also two global
+ variables that argp knows about defined here,
+ ARGP_PROGRAM_VERSION and ARGP_PROGRAM_BUG_ADDRESS (they are
+ global variables because they will almost always be constant
+ for a given program, even if it uses different argument
+ parsers for various tasks). */
+
+#include <stdlib.h>
+#include <argp.h>
+
+const char *argp_program_version =
+ "argp-ex2 1.0";
+const char *argp_program_bug_address =
+ "<bug-gnu-utils@@gnu.org>";
+
+/* Program documentation. */
+static char doc[] =
+ "Argp example #2 -- a pretty minimal program using argp";
+
+/* Our argument parser. The @code{options}, @code{parser}, and
+ @code{args_doc} fields are zero because we have neither options or
+ arguments; @code{doc} and @code{argp_program_bug_address} will be
+ used in the output for @samp{--help}, and the @samp{--version}
+ option will print out @code{argp_program_version}. */
+static struct argp argp = { 0, 0, 0, doc };
+
+int main (int argc, char **argv)
+{
+ argp_parse (&argp, argc, argv, 0, 0, 0);
+ exit (0);
+}